Warp stop-motion for looms.



No. 813,308. PATENTED FEB. 20, 1906.

' F. E. KIP 615B. GREENWOOD.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED MAR.3, 1905.

a SHEETS-SHEET 1.

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ATTORNEY PATENTED FEB. 20, 1906. F. E. KIP & E. GREENWOOD.

WARP STOP MOTION FOR LOOMS. APPLICATION FILED MAR.3, 1905.

3 SHEETS-SHEET 2 WITNESSES: ()LNVENTOR 3 W ATTORNEY No. 813,308. PATENTED FEB. 20, 1906..

P. E. KIP & E. GREENWOOD. WARP STOP MOTION FOR LOO-MS.

APPLICATION FILED NAILS, 1905.

3 SHEETS-SHEET 3,

FNVENTOR S v WITNESSES: 4 01.

Mk4 I6 I JJQDWW ATTORNEY- UNITED s'rA'rEs PATENT OFFICE.

FREDERIC E. KlP, OF MONTCLAI'R. NEW JERSEY, AND ERNEST GREENWOOD, OF BRIDGEPORT, CONNECTICUT, ASSIGNORS TO RIP-ARMSTRONG COM- PANY, OF NEW YORK, N. Y., A CORPORATION NEW YORK.

WARP STOP-MOTION FOR Looms.

Specification of Letters Patent.

1905.- Serial No. 248,252.

Patented Feb. 20, 1906.

Application filed March 3,

To all whom it may concern.-

Be it known that we, FREDERIC E. KIP, aresident of Montclair, New Jersey, and ER- NEST GREENWOOD, a resident of Bridgeport, Connecticut, citizens of the United States, have invented certain new and useful Iniprovements in War Stop-Motions for Looms, of which the followlng is a specification.

The present invention relates to a warp stop-motion for looms contained in the harness and in which the formation of the shed is not only controlled by the heddles, but the latter also act to close an electric circuit upon the breakageor undue slackness of a warp-' thread to set in operation theloom-stopping mechanism.

To that end the invention embodies an electric circuit which is controlled in such manner as to be alternatel opened and closed at two points by the hedd e-frames as the latter are moved in the formation of a shed, one such point being within the harness .frame and the other without, the operation being so timed during the normal runnin of the loom that when, the circuit is close at one point it is broken-at the other. The heddle or harness frames comprise as one of the lifting-bars for the heddles a compound-terminal, with one member of which the heddles are in constant contact; complete electrical engagement being made when the harnessframes are in an elevated position and also when a warp-thread breaks or becomes un' duly slack, although in the former instance the loom is prevented from knocking off by the breaking of the circuit at the po nt outside of the frames.

The invention will be understood by refer ence to the accompanying drawings, in which Figure 1 is a side elevation of a loom, show' ing the application of the invention thereto, parts of the loom-frame being broken away; Fig. 2, a front elevation of the left-hand end of the breast-beam; Fig. 3, a perspective detail view; Fig. 4, a diagrammatic view showing two of the harness-frames and" the controlling-circuit. Fig. 5 is a vertical sectional view of a harness frame. Fig. 6 is a side view, partly in section, showing the contactshoes. Fi 7 .is a front'vi'ew of the same. Fig. 8 is a etail view. Fig.9 is a front view of a harness-frame, showing the manner of 2, breast-beam 8, shipper-lever 4, and warpbeam 5 may be and are of the usual construction and arrangement in looms. The shipperlever, as usual, occupies a slot 6 in a bracket 7, forming an extension of the breast beam, and engages when the loom is running a shoulder 8. When freed from this shoulder, a spring (not shown) shifts the shipperlever to stop the loom. In order to set the shipper lever free, an electromagnet 9 is mounted below the breast-beam upon a bracket 10, secured by suitable means to the loom-frame, and its armature-lever 11, fulcrumed at 11 on said bracket,,is connected by a link or wire rod 12 to one end of a da ger 13. Pivotally supported by a pin or stu 14 in a bracket 15, secured to the loom-frame, is a knock-ofi lever 16, attached at its lower end to the dagger 13 (see Fig. 3) and at its upper end adapted to engage the shipperlever 4.

the-lay or some other vibrating or moving part of the loom'; b ut when the magnet 9 is energized through the means hereinafter described the dagger is moved into such position as to be impinged'upon by the face of said hunter, thereby moving the knock-off lever to free the shipper-lever andstop the loom, as will be readily understood. In this connection we have shown a form of bunter described in the patent of Allan A. Johnson, No. 778,132, dated December 20, 1904, as such bunter prevents the operative from interfering with the efiectiveness. of the knockofi mechanism, although anv other suitable form of bunter could be used. 1

In order to energize the electromagnet 9,

is employed, which circuit includes the coils' of said magnet, a cut-out switch 19, and con- IOC tact-terminals outside of the harness-frames and adapted to be enga ed by shoes connected to said frames to comp ete the circuit at such times,

The heddle or harness frames, of which there may be any desired number, are composed of top and bottom bars and 21, respectively connected at or near their ends by side bars '22. ,They may be supported in any well-known or suitable manner-as, for example, by straps connecting the upper bars20 with actuating-levers, springs 23, secured to the lower bars 21 and to a fixed late 24, serving to pull the frames to their owermost positions after having been raised to the limit of their upward movement by the straps and actuating-levers. Rigidly secured to the side bars 22 of each frame is a bar 25, and above the same, near the up er part of the frame and also rigidly secure to the side bars, is a com ound electrode or terminal, which terminal is of well-known construction and comprises an electrically-conductive body member 26 into one edge of which is set an electrically-conductive strip or blade 27, properly insulated from the body thickness of the body members 26 0f the cornpound terminals and the bars is substantially equal to the width of the slots 29 and 30,

" so as to maintain the heddles in proper vertical position and in side contact with said members and bars, and thelength of said slots is such as to permit of a'slight vertical movement of the heddles independently of the movement of the frames. The upper Wall of the slot 30 is preferably inclined to insure proper electrical engagement with the blade 27 of the compound terminal l/Vhen the loom is running normally, the heddle-frames will'act as usual loom-harnesses for the formation of the shed. When a frame is raised to it suppermost position, the tendency of a warp-thread is to draw its heddle downward. and into electrical en agement with the compound terminal. hen

the harness is dropped so' far as to depress the threads which it controls below their normal level, then each of the threads which. is intact or unbroken raises its heddle and supports it out of operative engagement with the compound terminal. If, however, one of the threads is broken, then its lieddle will fall into' electrical engagement with the compound terminal, and when the frame containing the broken thread reaches its lowermost position thenthe circuit is closed, not only through said terminal, but also through the spring plates, which. in reality constitute a switch, as

will be hereinafter described, and the current is then free to flow through its completed circuit. If the circuit is not out out at all times other than when the frame is at its lowermost position, then the loom will be stopped not onl when the harness-frames are at their higllest positions, but also when sufliciently raised to permit the heddles to hang loosely. In other words, when the loom is running normally and a circuit is closedthrough the compound terminal by the upward inove ment of the harness it must be broken at a switch outside of the harness-frames. Each harness-frame with its heddles must therefore be an electrical unit, each containing in itself the electrical stopping elements and each rovided with controlling devices to admit t e electrical current to those elements at the proper time and withhold it from them at all other times. g

In an application filed of even date herewith in the names of Frederic E. Kip and Frederick M. Armstrong, Serial No. 248,251, there is described a warp stop-motion comprising a switch located outside of the heddleframes and adapted to alternately open and close the circuit for each frame during a complete upward and downward movement of the frame, and that application claims broadly the subject-matter of the present application, it bein the intention to restrict the claims of the latter to the specific mechanism for accomplishing the desired results. To break the circuit 18 during the normal running of the loom when the heddles are in electrical engagement with the compound terminal and to close it at a point outside the heddle-frames when the heddles are not so engaged, and also to close said circuit at said outside point and at the compound terminal when a warp-thread breaks or becomeslunduly slack, we have devised the mechanism now to be described. p

At a convenient point onthe loom-frame and preferably above the harness-frames is rigidly secured a block 31, made ofnon-con-j ducting material, andsecured to said block are two spring-plates 32 and 33, to which the terminals of thecontrolling-circuit 18 are respectively connected in anysuitable manner.

rzo

the rod 37 is similarly connected to the body member 26 of the compound terminal in the particular manner hereinafter described. The bent up er arms of the rods 36 and 37 arepassed '0' rough the insulatin blocks 35 and terminate on the side of the b ock toward the spring-plates 32 and 33 in suitable buttons or joined to The compound terminal is overturning by an engaging forked piece 43,

44-and 45.

shoes 38 to prevent [said rods from being withdrawn from the blocks, said shoes also being adapted to properly contact with said spring-plates to close thecircuit at that. point when a harnessframe is at its lowermost position. It will be noted that the rod 36is directly over the rod 37 and is maintained away from its fellow'rod to prevent short-circuiting by a spring 39 on the upper bent arms, as shown clearly in Fig. 6. I

The connecting-rods 36 and 37 may be the harness-frame and to the compound terminal in any suitable manner, the specific means devised by us being as follows: Each end of the body member 26 of the compound terminal is formed with a small lug 40, pierced to receive a;holding-bolt 41, the latter being a simple draw-bolt of the usual type provided with a nut 42 at one end and at the other end with a hook, as shown in Fig. 8. prevented from screwed to the harness-frame. Interposed between the end of the draw-bolt at the right in Fig, 9 and the harness-frame are two plates (Shown in Fig. 12.) In the upper end of the plate 44 is an elliptical slot 46, the major axis of which is such as to admit the hooked end of the connecting-rod 37 when the plate 45, which is formed with a fork 47 at the top and a slot 48 for the draw-bolt 41 atthe bottom, is slipped up to lock the rod 37 in place. At the same end of the compound terminal the body member thereof is cut away fronn around the blade, as shown in Fig. '9, and at that point a pinch-clamp '49 is fastened to the blade 27, and the upper end of this clamp is connected with a conductingstrip 50, that projects through the harness-. frame. In the end of said strip 50 is aneye to receive the the latter being held clip 51, which when the rod '36 is to be removed from the harness-frame may be swung to one side. Each harness-frame is provided with connecting-rods 36 and 37 and slideblocks 35 and each has a set of corresponding spring-plates 32 and 33 ,as above described. In practice one branch of the controlling-circuit 18 may be connected to one of the plates 32 and all of the other plates 32 electrically connected to the first one, or one branch of the controlling-circuit 18 may have branch connections to all of the plates 32. In a'similar manner .all of the plates 33 may be; electrically connected.

The 0 erationof the mechanism above ,de-

scribed will be readily understood, and for the sake of clearness we will refer to two harnoes-frames 52 and 53 (shown in Fig. 4) and assume that at each pick of the loom said two frames are. moved alternately,- causing the threads carried thereby to be alternately moved into the upper and lower planes of a shed. [is the frame 52 is made in the usual point.

lower bent arm of the rod 36,-

in its. eye by a spring-' manner to move the warp-threads 54 to form the lower plane of a shed, the tension of such warp-threads, ifv unbroken, will hold the heddles through which they pass out of contact with the blade 27 of the compound terminal, thus opening or breaking the circuit at that At the same time, however, the connecting-rods 36 and 37 have moved the block 35 corresponding to the frame 52 into such position that the shoes 38 on the. ends of said rods are brought, respectively, into electrical engagement with the spring-plates 32 and 33, thereby closin the circuit for the frame 52 at that point. The reverse situation at such time is present in the harnessframe In that frame, shown at its uppermost position, the tension of the warp-threads 55 holds the heddles in contact with the blade 27 of the 00111" I pound'terminal, thereby closing the circuit at that point; but the connecting-rods 36' and 37 have raised the shoes 38 to aposition above and out of electrical engagement with the spring-plates 32 and 33 corresponding to the harness-frame 53, thereby breaking-the circuit at that point. Thus it will be seen that the controlling-circuit 18 has two points at whic h during the normal operation of the loom it is alternately broken and closed, one within the harness-frame and the other outside thereof,

and that for a given harness-frame when the circuit is broken at onepoint it will be closed at the other. The parts described are so con.- structed and'their operation so timed during the normal running of the loom that the shoes 38 corresponding to a particular harnessframe do, not make electrical engagement with their spring-plates 32 and 33 until after the heddles of that frame have been raised in the downward movement of the frame by the tension of the warp-threads out of contact with the blade 27 of the compound terminal. In other words, whenthe loom is running normally the circuit is not closed at the same time through the compound terminal and the spring-plates 32 and 33. frame begins to rise no movement will be imparted to the heddles, owing to the slight vertical play allowed them; but as the upward movement of the frame continues the comound terminal will engage the upper walls of the slots 30 in the heddles 28, and the latter will be raised with. the frame, the tension of the thread acting in'a downward direction af ter they are raised above their normal level .to hold the heddles in electrical engagement with the compound terminal. The lower 'slot 29 is made longer than the upper slot 30, so as to insure good electrical contact between the compound terminal and a fallen 'heddle. If awarp-t'hread should break when 1 a harness-frame is at its lowermost position, its heddle fallsand makes electrical engage- Lment with the blade 27 of the compound terminal. The circuit when. the frame contain ing the broken thread is n that gOSltlOIl 15 As the harnessthen closed through both the compound terminal and the spring-plates 32 and 33 and thus energized, its armature-lever 11 is atthe p present application a mechanical locking de- I tracted and moves the dagger 13 into position tobe impinged upon by the hunter 17 to thereby stop the loom. If a thread should break when the frame is at its uppermost po-' sition, its heddle being already in contact with the blade 27, so as to close the circuit through the compound terminal, will remain in that position during the downward movemerit of the frame; but the stopping mechanism w'ill not be thrown into action until the frame is moved to its lowermost position to bring the shoes 38 of that frame into electrical engagement with the corresponding springplates 32 and 33. Likewise if a threadshould break-when a frame is at an intermediate position the circuit will be immediately closed through the fallen heddle and the compound terminal; but the loom will not be knocked off until the frame reaches its lowermost position, so: as to close the circuit through the springplates 32 and 33. In other words, the controlling-circuit 18 is closed both through the compound terminal and the springplates.

32 and 33 only when the harness-frame is at or about its lowermost position and that said circuit is closed through the compound terminal no matter in What position the frame may be whenever a-warp-thread breaks or becomes unduly slack- The resent construction differs, among other t ings, from the companion application above referred to in that the former involves no ground-circuit at the harness, a di-' rect electrical connection being made with both the blade and the-body member of the compound terminal, the current entering and returning from the h' rness through the springplates 32 and 3.3, whereasinsaid' companion application the currenti'enters the harnessframe from the switch, running to the blade of the compound terminal, and 'isgrounded through the pull-down springs. v

When the loom is operated at high. speed, the duration of the electric current through the circuit is so short as to amount to hardly more than an impulse, being frequently just sufficient to move the armature and its connected dagger, 'but not sufficient to hold themin position to engage the dagger with punter and stop the loom. To insure the mai tenanoe of the dagger in position after it has once been set by the movement of the armature of the electromagnet, it is desirable to have some kind of locking means for the dagger. For that purpose we have shown in the vice comprising a lever 57, pivoted at its lower ward to hold the pin 59 in proper engagement with the shoulder 58. The armature-lever may be released as soon as the loom is stopped by moving the lever 57 back by hand or when the loom is again started by an arm 61, attachedto the shipper-lever and adapted to contact with the lever 57. In order to save the batteries, it is desirable that the circuit should be broken after the current has done the work required of .it in moving the dagger 13 in position to be impinged upon by the bunter 17. To effect this, we include any ordinary form of switch 19 (shown in section in Fig. 2) in the controlling-circuit 18, said circuit being normally closed through said switch. As here shown, the switch 19 is supported upon a bracket se cured to the loom-frame and is provided with a lever 62, adapted to be moved by a projecting arm 63 on the shipper-lever, said arm being forked or otherwise connected so as to move said lever in both directions-that is, to break the circuit at the switch 19 when the shipper-lever is moved to stop the loom and to close the circuit at said point when the shi per-lever is moved to start the loom.

n practiceit may be found desirable to use adjacent to the loom-harness two rods 64 to IOO' ower shed, so that in the normal running of I the loom a uniform plane will be maintained and \the usual amount of sag of the warpthreads prevented from .closing the circuit, and thus knocking off the loom.

1 What We claim, and desire to secure by 2 Letters Patent, is

1. In a warp stop-motion for looms the combination of a controlling-circuit for setting in operation the stopping mechanism, a harness-frame having a series of heddles suspended therein, a switch comprising plates to which the terminals of said circuit are conpended therein, a switch comprising plates to which the terminals of said circuit are connected, a slide-block having shoes connected"- the'circ'uit through said plates as the frame alternately rises and falls. 7

3. In a warp stop-'motion forjlooms the combination of acontrolling-cireuit for'set i '.to said frame and adapted to break and close ting in operation the stofgping mechanism, a

. harness-frame having a harness-frame having a d contact-bar secured thereto, a series of heddles suspended on said bar, a switch comprising plates to which the terminals of said circuit are connected and shoes carried by the harness: frame and electrically connected to said bar, said shoes being adapted to break and close the circuit through said plates as the frame alternately rises and falls.

4. In a war stop-motion for looms the combination oi a controlling-circuit for setting in operation the stoigping mechanism, a

ed contact-bar secured thereto, said bar comprising two members insulated from each other, a series of heddles suspended on said bar, a switch comprising plates to which the terminals of said circuit are connected, shoes carried by said frame and connected respectively to the members of said bar, said shoes being adapted to break and close the circuit through said plates as the frame alternately rises and falls.

5. In a war stop-motion for looms the combination 0? a controlling-circuit for setting in o eration the stofpyping mechanism, a harnessrame having a ed contact-bar secured thereto, said bar comprising two members insulated from each other, a series of heddles suspended on said bar, rods of conductive material secured to the members of said bar and carrying shoes attheir upper ends, contact-plates located outside of said frame and to which the circuit-wires are connected, the partsbeing so related to each other that during the normal running of the loom the circuit will be closed through said plates by contact of the shoes therewith only When the harness-frame is at or near its lowermost position the tension of the warpthreads at such times on the heddles serving to break the circuitat said contact-bar.

6. In a warp stop-motion combination of acontrolling-circuit for setting in operation the sto ping mechanism, a harnessame having a ed contact-bar secured thereto, said bar comprising two members insulated from each other, a series of heddles suspended on saidba'r, rods of con-- ductive material secured to the members of said bar and carrying shoes ends, a support of insulatin material having vertical bars, said shoes ein carried blocks su ported between sai guide-bars, contact-p ates secured to said support and to which the circuit-wires are connected, whereby during the normal running of the loom as the frame is raised and lowered the circuit will'be closed and broken plates. I

In testimony whereof We have hereunto signed our names in the presence of two subscribing witnesses.

FREDERIC E. KIP. ERNEST GREENWOOD.

KWitnesses to the'signatfire offltrederic E.

' ALFRED HoLRoYD, ARTHUR OAKLEY.

wood: I

JAMES W. Boo'rn, JAMES C. DBISCOLL.

for looms the alternately at said at their upper Witnesses to the signature of Ernest Green- 

